I never knew until recently that the Greek word most often translated as hallowed only occurs twice in the New Testament.

Update: As Peter Kirk pointed out to me, this isn’t true. While the specific verb form may be used twice in Matthew 6:9 and Luke 11:2, it occurs many more times in the New Testament. Please see the ISBE portion of the PDF file. (And read it more carefully than I did the first time around.)

Matthew 6:9
Pray then like this: “Our Father in heaven, hallowed be your name.

Luke 11:2
When you pray, say: “Father, hallowed be your name. Your kingdom come.

I put together a PDF file of some definitions that I printed out for a Bible study using out of copyright sources and thought I’d make it available here.

Here is a quote from the book we’re studying:

By requesting that God honor his name, Jesus teaches us to ask God to make all creation recognize and revere his holiness. Of course, included in creation is the one praying. So in the same breath that we request God to make his name holy everywhere else, we also ask God to make our own heart honor him.

By praying, ‘hallowed be your name,’ we make God’s holiness our highest priority and ask him to promote his glory in, around, and through us. Thus the first petition of the Lord’s Prayer asks that all creation reverence God and that God exercise his will in ways that will advance his name in all the earth. The petition for God to hallow his name asks God to fulfill his righteous purposes for his glory.

–Bryan Chapell, Praying Backwards